Answer:
total ground and wall angle is 90°
beam angle with ground= 51
beam angle with wall =39
because total angle=angle with ground + angle with wall
angle with wall=total angle-angle with ground
angle with wall= 90-51=39
Answer:
i angle EFB
ii BFC and AFC
Step-by-step explanation:
2L = 2000mL
2000mL / 400mL = 5
therefore, each cup is filled exactly half way
There is 200mL in each of the 10 cups.
Answer:
100 yards
Step-by-step explanation:
It takes 4 yards of fabric to make a costume for one student. She needs to make costumes for every student in chorus, so you just multiply this number by 25 and get 100 yards.
Answer:
See explanation
Step-by-step explanation:
Let x be the number of hours per week Nando is brisk walking and y be the number of hours per week Nando is biking at a moderate pace.
For the first month, he needs to exercise at most five hours per week, then
![x+y\le 5](https://tex.z-dn.net/?f=x%2By%5Cle%205)
Brisk walking burns about 350 calories per hour, then it burns 350x calories per x hours.
Biking at a moderate pace burns about 700 calories per hour, then it burns 700y calories per y hours.
Nando must burn at least 2,000 calories per week, so
![350x+700y\ge 2,000](https://tex.z-dn.net/?f=350x%2B700y%5Cge%202%2C000)
You get the system of two inequalities:
![\left\{\begin{array}{l}x+y\le 5\\ 350x+700y\ge 2,000\end{array}\right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%5Cbegin%7Barray%7D%7Bl%7Dx%2By%5Cle%205%5C%5C%20350x%2B700y%5Cge%202%2C000%5Cend%7Barray%7D%5Cright.)
The attached graph shows the solution set to this system of inequalities. In this diagram, red region represents the solution set to the first inequality, blue region represents the solution set to the second inequality and their intersection is the solution set to the system of two inequalities.